According to a number of internet forums, including a growing thread on Bungie's own website, Halo: Reach players are experiencing disc read errors, leaving many unable to play the game.

It's currently unclear what is causing the issue. Many report older Xbox 360 consoles have trouble reading the game disc, however, others have said they've played the game on a launch unit and have experienced no problems.

"We are aware of a very small number of customers reporting that their copy of Halo: Reach is causing a "disc read" error," a representative said. "Those affected should contact Microsoft customer support at 1-800-4MY-XBOX for troubleshooting assistance."

It was also discovered last week the new, 4GB Xbox 360 consoles were unable to play Halo: Reach's online co-op mode due to hard drive limitations.

In Halo: Reach, players experience the fateful moments that forged the Halo legend. It's the story of a squad of heroic Spartan soldiers, and their final stand on planet Reach, humanity's last line of defense between the terrifying Covenant and Earth.